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Collections.emptyList() vs. new instance
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The main difference is that Collections.emptyList() returns an immutable list, i.e., a list to which you cannot add elements. (Same applies to the List.of() introduced in Java 9.)
In the rare cases where you do want to modify the retu...
How do I trigger the success callback on a model.save()?
...l updates). So what is the purpose of the attribute name-values? (2) What if you just want to save the model after performing some .set()s - why the attribute list? (3) In the docs, the attribute list param is shown as optional. Can you clarify? Thanks.
– UpTheCreek
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Best way to convert string to bytes in Python 3?
There appear to be two different ways to convert a string to bytes, as seen in the answers to TypeError: 'str' does not support the buffer interface
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bind event only once
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If you can apply it, probably want to take a look at event.preventDefault and event.stopPropagation
OR unbind and bind each time, within your method like
function someMethod()
{
$(obj).off('click').on('click', function(e) ...
How does delete[] know it's an array?
... result in undefined behavior. Your second main() example is unsafe, even if it doesn't immediately crash.
The compiler does have to keep track of how many objects need to be deleted somehow. It may do this by over-allocating enough to store the array size. For more details, see the C++ Super FA...
Proper way to rename solution (and directories) in Visual Studio
...file method below (references disappearing), but it can result in problems if your project is under source control (see notes below). This is why step 2 (backup) is so important.
Close Visual Studio.
Create a backup of your .sln file (you can always roll back).
Imagine you want to rename director...
jQuery first child of “this”
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If you want to apply a selector to the context provided by an existing jQuery set, try the find() function:
element.find(">:first-child").toggleClass("redClass");
Jørn Schou-Rode noted that you probably only want to fi...
How can I convert a long to int in Java?
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Casting has different meanings for objects and for primitive types. (int) l doesn't try to treat a 64-bit integer as a 32-bit integer, it actually returns a different 32-bit integer with the same 32 lower order bits. With objects, you c...
Removing items from a list [duplicate]
...= list.listIterator(); iter.hasNext(); ) {
String a = iter.next();
if (...) {
iter.remove();
}
}
Making an additional assumption that the list is of strings.
As already answered, an list.iterator() is needed. The listIterator can do a bit of navigation too.
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JavaScript/jQuery to download file via POST with JSON data
...s. document.body.innerHTML += takes the HTML text of the body, appends the iframe HTML, and sets the innerHTML of the page to that string. This will wipe out any event bindings your page has, amongst other things. Create an element and use appendChild instead.
$.post('/create_binary_file.php', post...